public class SingletonLazy {
    private static volatile SingletonLazy instance = null;

    public static SingletonLazy getInstance(){
        if(instance == null){
            synchronized(SingletonLazy.class){
                if(instance == null){
                    instance = new SingletonLazy();
                }
            }
        }
        return instance;
    }

    private SingletonLazy(){

    }
}
